U.S. Code / Title 21 — Food and Drugs / Chapter 6—Narcotic DrugsTitle 21ImportationImportation or ExportationContents§ 171 to 174. Repealed. Pub. L. 91–513, title III, §1101(a)(2), (4), Oct. 27, 1970, 84 Stat. 1291§ 175. Repealed. June 27, 1952, ch. 477, title IV, §403(a)(10), 66 Stat. 279§ 176 to 185. Repealed. Pub. L. 91–513, title III, §1101(a)(2), (9), Oct. 27, 1970, 84 Stat. 1291, 1292